Worldwide temperatures last month soared to new heights for October, boosted by the second-strongest El Nino on record, adding to the likelihood that 2015 will also smash annual heat records..Scientists say El Ninos add about 0.1 to 0.2 degrees to global temperatures. This boost is coming on top of background warming of about 0.9 degrees over the past century, increasing the likelihood that heat records will continue to fall